Does the upper come with a bcg and charging handle? Also, really stupid question, but if I added this to a lower, lower parts kit, and stock, I would be good to go right?

No, the upper does not come with the BCG + CH. However, if since the upper comes with a stock, buffer tube, buffer, and spring, the only things you would need for a fully operational rifle are:
an offlist lower with an LPK and maglock installed
a BCG + CH.